Explosion engine



Oct. 22, 1940. TEBALDI 2,219,241

EXPLOSION ENGINE Filed April 26; 1939 Flg 1 Fig.2

Fig. 3 l3 'INVENTTOR ALESSANDRO TEBALDI w Tm) ATTYS.

Patented Oct. 22, 1940 UNITED STATES EXPLOSION ENGINE AlessandroTebaldi, Milan, Italy,

half to Fabbrica Automobili Iaot or of oneta Fraschlni,

Milan, Italy, a corporation of Italy Application April 26, 1939, SerialN0. 270,228

' In Italy May 10, 193

4 Claims.

The present invention relates to multi-cylinder explosion engines withaligned cylinders and it has for its object a head for the cylinderblocks of said engines which provides for feeding the operative mixtureto the engine cylinders in conditions ensuring a satisfactory combustionof said explosive mixture said head having further a comparatively smallsize and a simple construction.

The head according to this invention includes for each engine cylinderat least two inlet ports and two outlet ports which alternate with eachother around the cylinder axis in such a location as the equivalentports in two adjacent cylinders 16 are located near each other. Thus, ineach cylinder the inlet ports are arranged in such locations as toprovide for a satisfactory stirring of the mixture and at the same timea single manifold may cooperate with the corresponding ports of twocylinders; accordingly the space requirement depending upon a largenumber of tubes around the engine cylinder top is removed.

A. construction of a head for a multi-cylinder explosion engine inaccordance with this invention is shown by way of example on the annexeddrawing and:

Fig. 1 is a diagrammatic plan view showing the interconnections of thecylinders with inlet manifolds and exhaust ducts;

39 Fig. 2 is a vertical transverse section on line 22 of Fig. 1, of thehead with a cooperating cylinder;

Fig. 3 is a fragmentary sectional view to an enlarged scale on line 3-3,Fig. 1, of a portion of the head in register with two adjacentcylinders, some parts being omitted.

In said fi ures the engine cylinders are referenced i and the head isreferenced 2, this head 2 having valves 3 and cam shafts 4 with cams 9for the valve actuation mounted therein. As apparent the head 2 consistsof a casing having partitions to provide ducts and a wall which extendsover the cylinder tops and has ports as 5, 5', 6, 6' provided therein,said ports being connected with respective ducts and opening in ports ofthe cylinder tops which are controlled by valves 3.

As well understood in each of the cylinders I reciprocates a pistonwhose connecting rod engages a crank of a crank shaft mounted to rotatein a crank case on which the cylinders I are fast, and an appropriategear connects said crank shaft with the cam shafts 4 under a properratio for the conventional engine operation, only the parts located inthe engine head being shown in the drawing while the other parts are notillustrated nor further described being well known and conventionalones.

In the illustrated construction the head 2 has four ports 5, 5', 6, 6 inregister with each cylinder 5 two of said ports, as I, 5', being inletports and connected with a source of explosive mixture of any knownclass, while the ports 6, 6' are outlet ports; said ports 5,. 5', 6, 6'alternate with each other around the cylinder axis and are arranged m insuch positions as an inlet port and an outlet port of each cylinder arewithin a short distance with respect to the equivalent ones of anadjacent cylinder.

All the inlet ports 5 located on one side of the engine are connected bymeans of ducts as l3 with a manifold I which extends along the same sideof the head and all the inlet ports 5 located on the other side aresimilarly connected by ducts as I3 with a side manifold I. 20

The manifolds l, I, may, with advantage, be provided by casting in thehead and their top walls cooperate to support the pivots It of tappets 8by means of which the action of cams 9 is imparted to the valves 3 toopen them against the action of respective return springs 82.

The manifolds I, I join each other at the head end to provide a singleduct H in which a throttle valve (not shown) or other control member maybe located.

The outlet ports 6 and 6', respectively, of adjacent cylinders areconnected by pairs to common outlet ducts I0, as shown in Fig. l, thesaid ducts it opening directly in the atmosphere and being encircled byspaces l5 for cooling fluid circulation. The number of outlet ducts as10 is thus reduced with respect to that of the valves.

The provision of at least two inlet ports in each cylinder and theirarrangement at diametrically opposed points around the axis of therespective 40 cylinder cause the explosive mixture fed into eachcylinder to be satisfactorily stirred.

What I claim as my invention and desire to secure by United StatesLetters Patent is:

1. A head for multi-cylinder explosion engines with cylinders in linecomprising a casing which 45 extends over the tops of said cylinders andpartitions in said casing, said casing and partitions therein providinga number of inlet ports and a number of outlet ports opening in eachcylinder and ducts connected therewith, said inlet ports and outletports for each cylinder alternating with each other around the axisthereof and the ports of all the cylinders being grouped in linesextending in the direction of the line of cylinders 55 and with an inletport of each cylinder adjacent in the same line to an inlet port of anadjacent cylinder and an outlet port of each cylinder adjacent in thesame line to an outlet port of the adjacent cylinder.

2. A head for multi-cylinder explosion engines with aligned cylinderscomprising a casing which extends over the tops of said cylinders andpartitions in said casing, said casing and partitions therein providinga number of inlet ports and a number of outlet ports opening in eachcylinder and ducts connected therewith, said inlet ports and outletports for each cylinder alternating with each other around the axisthereof and the ports of all the cylinders being grouped in linesextending in the direction of the line of cylinders and with an inletport of each cylinder adjacent in the same line to an inlet port of anadjacent cylinder and an outlet port of each cylinder adjacent in thesame line to an outlet port of the adjacent cylinder, said outlet portsof each pair of adjacent cylinders leading to a common outlet duct.

3. A head for multi-cylinder explosion engines with aligned-cylinderscomprising a casing which extends over the tops of said cylinders andpartitions in said casing, said casing and partitions therein providinga number of inlet ports and a number of outlet ports opening in eachcylinder and ducts connected therewith and a manifold in said casing oneach side thereof, said inlet ports and outlet ports for each cylinderbeing arranged around the axis thereof and alternating with each otherand the equivalent ports of each pair of adjacent cylinders beingadjacent with each other and said inlet ports on each side of said headbeing all connected with said manifold at titions in said casing, saidcasing and partitionstherein providing a number of inlet ports andanumber of outlet ports opening in each cylinder and ducts connectedtherewith and a manifold in said casing on each side thereof, said inletports and outlet ports for each cylinder being arranged around the axisthereof and alternating with each other and the equivalent ports of eachpair of adjacent cylinders being adjacent with each other, said inletports on each side of said head being all connected with said manifoldat the respective side and said two side inlet manifolds joining in asingle duct at the longitudinal end of said head.

ALISSANDRO TEBALDI.

